Use the method discussed under "Equations of the Form $d\frac{y}{d}x=G(ax+by)"$to solve Problems $17-20.$

$17.d\frac{y}{d}x=\sqrt[\phantom{2}]{x+y}-1$

$18.d\frac{y}{d}x=(x+y+2{)}^2$

$19.d\frac{y}{d}x=(x-y+5{)}^2$

$20.d\frac{y}{d}x=sin(x-y)$

Solve $17$ through $20$